Department of Radiology, Neurology, Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA. Lake Erie College of Osteopathic Medicine, Erie, PA, USA. Department of Ophthalmology, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan. Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. Department of Ophthalmology and Vision Sciences, Princess Margaret Hospital/University Health Network, University of Toronto, 610 University Avenue, Toronto, ON, M5G 2M9, Canada. Mostafa.hanout@gmail.com.